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  #31  
Old 05-18-2017, 04:51 PM
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My 2005 X5 4.4 with 148K miles does the same thing as others identify in this post, 1-2 shift has a delay and jerks when cold. I'm thinking it might have something to do with the square adapter seal between the valve body and trans main body. That, and there are 4 other sleeve looking seals under the valve body. Car is due for trans oil and filter change, so I plan to change out these seals and the gear selector seal.
Will the mechatronic valve body need to be reprogrammed? I'm thinking it won't, but just checking in case anyone else had to. According to a ZF replacement guide I found on-line, it said to reprogram if the unit was never programmed to the car before. So I'm assuming remove-replace won't require that.

Last edited by pghguy517; 05-22-2017 at 02:51 PM.
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  #32  
Old 05-22-2017, 02:50 PM
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Changed the square adapter seal and 4 round tube like seals between valve body and trans body, helped the 1-2 shift issue when cold, but didn't cure it. It's over all smoother shifting now though. Looked good inside, very little material on the magnets, fluid looked clean, no reprogramming required.
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  #33  
Old 05-22-2017, 06:13 PM
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Quote:
Originally Posted by pghguy517 View Post
Changed the square adapter seal...
Do you mean Part No 24347588727 on RealOEM.com?

Quote:
Originally Posted by pghguy517 View Post
...and 4 round tube like seals between valve body and trans body...
And,do you mean Part Nos 24107519314/15 and 24107520715?

Were your seals visibly worn to account, at least in part, for the hard-shift symptoms between 1st and 2nd that you describe? I found one other listing of these numbers on Xoutpost by 'bvbazel'. After replacing several transmission parts, including seals listed above, bvbazel said that it wasn't until after replacement of the DSC module and software update by dealer that the shifting issues were fixed.
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  #34  
Old 05-25-2017, 12:41 AM
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Quote:
Originally Posted by keduMINI View Post
Do you mean Part No 24347588727 on RealOEM.com?



And,do you mean Part Nos 24107519314/15 and 24107520715?

Were your seals visibly worn to account, at least in part, for the hard-shift symptoms between 1st and 2nd that you describe? I found one other listing of these numbers on Xoutpost by 'bvbazel'. After replacing several transmission parts, including seals listed above, bvbazel said that it wasn't until after replacement of the DSC module and software update by dealer that the shifting issues were fixed.
Yes, those are the seals I replaced. The square adapter seal was hardened, but not to the point were it was brittle, still was a little pliable. The other 4 tube like seals were mushroomed at on the top side and were compressed flush to the trans body. The replacement seals stuck out of the trans body about 1/16" so I'm sure they seal better now. All the seals, filter and pan gasket was $95 total from Pelican, and Amazon had a good price on Pentosin in 5L bottle, plus I had to buy 1 more liter for a total of 6L.
What's the DSC module? Is it something I can buy and plug in, or does it require going to the dealer? Any idea on cost? Since the hard 1-2 shift is only for the first mile when cold, and it's much less harsh now, I'll probably leave it as is unless the module and software upgrade is inexpensive.

Last edited by pghguy517; 05-25-2017 at 01:01 AM.
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  #35  
Old 06-26-2017, 03:08 PM
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So what is it that the adaptations actually do? Reseting adaptations for throttle and transmission are options on my scan tool. I haven't wanted to d a reset not knowing what it does exactly. I could read the adaptation codes if I could read hex, but I can't. Not sure where to even look to decode those.
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  #36  
Old 06-27-2017, 03:51 AM
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I think if it's a 6speed it's a zf unit. I think I recall seeing that somewhere. Someone on here recently had what sounds like the same issues as you are having and had the solenoids replaced. Have a search.


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  #37  
Old 06-27-2017, 04:16 AM
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Quote:
Originally Posted by Fifty150hs View Post
So what is it that the adaptations actually do? Reseting adaptations for throttle and transmission are options on my scan tool. I haven't wanted to d a reset not knowing what it does exactly. I could read the adaptation codes if I could read hex, but I can't. Not sure where to even look to decode those.
Someone will be along soon to correct me but my understanding is the adaptations are used to adjust transmission clutch operation pressures and times to account for wear as the transmission ages. The transmission control unit has baseline values for shift pressures and times etc. and compares the current operational values to the baseline. As the transmission ages, the control unit modifies the shift pressures and timing to ensure the shifting is optimal, storing these adjustments as adaptations.

If you perform significant maint. on the transmission and the adaptation values are no longer relevant, you need to reset them and allow the transmission to re-adapt to the new components etc.

Pretty sure its not advised to reset the adaptations "just because". In theory, this can result in worse transmission operation.

*edit* found this image (posted by Qsilver7 - of course!) which more or less confirms what I was saying... but it says it better than I did.

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Last edited by wpoll; 06-27-2017 at 02:55 PM.
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  #38  
Old 08-12-2019, 08:37 AM
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Hello I’m just wondering if any one has found a solution to this fault as I’m in this bother now ��.i replaced my transmission on my BMW X5 e53 3.0 2005 6 speed. I have a harsh downshift between 2nd and 1st and a small delay in d same gears goin up the rest are perfect. It’s worse when it heats up in city driving stopping and moving . Any help would be greatly appricated ��
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